PUZZLE

[verb] - to cause (someone) to feel confused and slightly worried because they cannot understand something, or to think hard about something in order to understand itThe findings of the survey puzzle me - they're not at all what I would have expected. [T]It puzzles me why she said that. [+ wh- word]We're still puzzling about how the accident could have happened. [I usually + adverb or preposition]Scientists are puzzling over (= thinking hard about) the results of the research on the drug. [I usually + adverb or preposition]To puzzle something out is to find it out by thinking hard.We haven't managed to puzzle out the solution to our problem yet.I can't puzzle out how I managed to spend so much money last month.